gorse(tojo)

Gorse, furze, furse or whin (Ulex) is a genus of about 20 plant species of thorny evergreen shrubs in the subfamily Faboideae of the pea family Fabaceae
Gorse is closely related to the brooms, and like them, has green stems and very small leaves and is adapted to dry growing conditions. However it differs in its extreme thorniness, with the shoots being modified into branched thorns 1–4 centimetres (0.39–1.6 in) long, which almost wholly replace the leaves as the plant's functioning photosynthetic organs. The leaves of young plants are trifoliate, but are later reduced to scales or small spines.[1] All the species have yellow flowers, some with a very long flowering season.